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Thanks so much. Honestly, no. I have heard Altecs and JBLs with well implemented super tweeters and have a pair of JBL 2405s ready to go but I just don't really feel the need as this seems to be hitting the right notes as a two way. I will likely give it a go at some point because... ADHD but...

Thank you very much! Definitely a labour of love. : )

Thank you. The cabinets are 40" H x 26W x 20D with an internal volume of around 10³. They measure 51H with the 511s. The entire box is 3/4" Baltic Birch which is doubled up at the base and mitered in the top front corners. This required some careful work with a chisel, a Japanese handsaw and a...

We went with a rear port near the bottom. It's 4" on the inside flared to 5" on the outside using 3/4" Baltic Birch. The upper 3/4 are lined with a firm 1" wool felt and the bottom has 1 bag of Polyfill. Tuning frequency is 28.25Hz. The crossover is the Heathkit AS-101 800Hz (thanks, Adam Guy)...

Howdy folks. Wanted to post a pic of the Altec DIY build I've been working on for the last year since first acquiring a pair of 416-8Bs. I had initially planned on building the Hiraga Onken 360s but decided in the end that a slightly beefed up 620A cabinet would work best in my space. Some of...

Oh, snap. Just read the X-kits Electronics link. Will order some of those in the meantime. Thanks again!

Thanks Gene and Topper. I was at work yesterday so couldn't really keep up on this. I've just re-read it and think I will try to run it without the electronic crossover first and feed the full range signal to the woofer with the fuse in place. I do want to pick up either a Pioneer D23 or D70...

Thanks again, Gene. Will give the link a read after work and will likely send you a message to chat further about this.

Thanks for the info, guys. So, just to be clear as mud. One person says it's ok to run the woofer full range without the active crossover and one says to use the active crossover? Is there any risk to the woofer by not using it? Thanks again for your input.

Hi Topper, Thanks for the reply. The other thing I had noticed and forgot to ask about (thanks for the reminder), was that the wiring to the woofer is reversed. Is that what you are referring to?

I really wish I had grabbed that one when I had the chance. And it was reasonably priced to boot!

Sorry, meant to say D23 and not D70.

Hi Gene, Thanks so much for your reply. It was kind of what I thought but the wording of that manual left me thoroughly confused. It's nice to meet another M22 owner. I also have the C23 and foolishly passed on a D70 so am still on the hunt for one of those. I might be able to get a Pioneer...

Hi again, Am hoping someone might be able to help with this. I've purchased a pair of Heathkit AS-101 bi-amp crossovers for the DIY project I'm working on and the schematic specifies no filtration from the woofer (Altec 416-8b) to the LF power amplifier. However, the manual also states that it...

Thanks, Woody! Happy to be here.

Glad to be here! From my internet wanderings, this seems to be one of the better hi-fi forums I've found. Thanks for the kind words on the build. It's definitely getting there. Need to nail down the XO and port tuning and then it will be on to finishing. Will post more pics as it moves along.

Hi all, Long post alert. Greetings from Vancouver BC. Long time listener, first time caller. Am writing this on my phone so will try to be diligent about catching auto corrects and what not but please bear with me. Here goes. About a year ago, after spending several years down the vintage JBL...